NOTE	implicit vs. explicit repetitions : 2009-02-02

# Glenn Fowler <gsf@research.att.com>
# conforming matches (column 4) must match one of the following BREs
#	NOMATCH
#	(0,.)\((\(.\),\(.\))(?,?)(\2,\3)\)*
#	(0,.)\((\(.\),\(.\))(\2,\3)(?,?)\)*
# i.e., each 3-tuple has two identical elements and one (?,?)

E	((..)|(.))				NULL		NOMATCH
E	((..)|(.))((..)|(.))			NULL		NOMATCH
E	((..)|(.))((..)|(.))((..)|(.))		NULL		NOMATCH

E	((..)|(.)){1}				NULL		NOMATCH
E	((..)|(.)){2}				NULL		NOMATCH
E	((..)|(.)){3}				NULL		NOMATCH

E	((..)|(.))*				NULL		(0,0)

E	((..)|(.))				a		(0,1)(0,1)(?,?)(0,1)
E	((..)|(.))((..)|(.))			a		NOMATCH
E	((..)|(.))((..)|(.))((..)|(.))		a		NOMATCH

E	((..)|(.)){1}				a		(0,1)(0,1)(?,?)(0,1)
E	((..)|(.)){2}				a		NOMATCH
E	((..)|(.)){3}				a		NOMATCH

E	((..)|(.))*				a		(0,1)(0,1)(?,?)(0,1)

E	((..)|(.))				aa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.))((..)|(.))			aa		(0,2)(0,1)(?,?)(0,1)(1,2)(?,?)(1,2)
E	((..)|(.))((..)|(.))((..)|(.))		aa		NOMATCH

E	((..)|(.)){1}				aa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.)){2}				aa		(0,2)(1,2)(?,?)(1,2)
E	((..)|(.)){3}				aa		NOMATCH

E	((..)|(.))*				aa		(0,2)(0,2)(0,2)(?,?)

E	((..)|(.))				aaa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.))((..)|(.))			aaa		(0,3)(0,2)(0,2)(?,?)(2,3)(?,?)(2,3)
E	((..)|(.))((..)|(.))((..)|(.))		aaa		(0,3)(0,1)(?,?)(0,1)(1,2)(?,?)(1,2)(2,3)(?,?)(2,3)

E	((..)|(.)){1}				aaa		(0,2)(0,2)(0,2)(?,?)
#E	((..)|(.)){2}				aaa		(0,3)(2,3)(?,?)(2,3)
E	((..)|(.)){2}				aaa		(0,3)(2,3)(0,2)(2,3)	RE2/Go
E	((..)|(.)){3}				aaa		(0,3)(2,3)(?,?)(2,3)

#E	((..)|(.))*				aaa		(0,3)(2,3)(?,?)(2,3)
E	((..)|(.))*				aaa		(0,3)(2,3)(0,2)(2,3)	RE2/Go

E	((..)|(.))				aaaa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.))((..)|(.))			aaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
E	((..)|(.))((..)|(.))((..)|(.))		aaaa		(0,4)(0,2)(0,2)(?,?)(2,3)(?,?)(2,3)(3,4)(?,?)(3,4)

E	((..)|(.)){1}				aaaa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.)){2}				aaaa		(0,4)(2,4)(2,4)(?,?)
#E	((..)|(.)){3}				aaaa		(0,4)(3,4)(?,?)(3,4)
E	((..)|(.)){3}				aaaa		(0,4)(3,4)(0,2)(3,4)	RE2/Go

E	((..)|(.))*				aaaa		(0,4)(2,4)(2,4)(?,?)

E	((..)|(.))				aaaaa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.))((..)|(.))			aaaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
E	((..)|(.))((..)|(.))((..)|(.))		aaaaa		(0,5)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)(4,5)(?,?)(4,5)

E	((..)|(.)){1}				aaaaa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.)){2}				aaaaa		(0,4)(2,4)(2,4)(?,?)
#E	((..)|(.)){3}				aaaaa		(0,5)(4,5)(?,?)(4,5)
E	((..)|(.)){3}				aaaaa		(0,5)(4,5)(2,4)(4,5)	RE2/Go

#E	((..)|(.))*				aaaaa		(0,5)(4,5)(?,?)(4,5)
E	((..)|(.))*				aaaaa		(0,5)(4,5)(2,4)(4,5)	RE2/Go

E	((..)|(.))				aaaaaa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.))((..)|(.))			aaaaaa		(0,4)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)
E	((..)|(.))((..)|(.))((..)|(.))		aaaaaa		(0,6)(0,2)(0,2)(?,?)(2,4)(2,4)(?,?)(4,6)(4,6)(?,?)

E	((..)|(.)){1}				aaaaaa		(0,2)(0,2)(0,2)(?,?)
E	((..)|(.)){2}				aaaaaa		(0,4)(2,4)(2,4)(?,?)
E	((..)|(.)){3}				aaaaaa		(0,6)(4,6)(4,6)(?,?)

E	((..)|(.))*				aaaaaa		(0,6)(4,6)(4,6)(?,?)

NOTE	additional repetition tests graciously provided by Chris Kuklewicz www.haskell.org 2009-02-02

# These test a bug in OS X / FreeBSD / NetBSD, and libtree. 
# Linux/GLIBC gets the {8,} and {8,8} wrong.

:HA#100:E	X(.?){0,}Y	X1234567Y	(0,9)(7,8)
:HA#101:E	X(.?){1,}Y	X1234567Y	(0,9)(7,8)
:HA#102:E	X(.?){2,}Y	X1234567Y	(0,9)(7,8)
:HA#103:E	X(.?){3,}Y	X1234567Y	(0,9)(7,8)
:HA#104:E	X(.?){4,}Y	X1234567Y	(0,9)(7,8)
:HA#105:E	X(.?){5,}Y	X1234567Y	(0,9)(7,8)
:HA#106:E	X(.?){6,}Y	X1234567Y	(0,9)(7,8)
:HA#107:E	X(.?){7,}Y	X1234567Y	(0,9)(7,8)
:HA#108:E	X(.?){8,}Y	X1234567Y	(0,9)(8,8)
#:HA#110:E	X(.?){0,8}Y	X1234567Y	(0,9)(7,8)
:HA#110:E	X(.?){0,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
#:HA#111:E	X(.?){1,8}Y	X1234567Y	(0,9)(7,8)
:HA#111:E	X(.?){1,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
#:HA#112:E	X(.?){2,8}Y	X1234567Y	(0,9)(7,8)
:HA#112:E	X(.?){2,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
#:HA#113:E	X(.?){3,8}Y	X1234567Y	(0,9)(7,8)
:HA#113:E	X(.?){3,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
#:HA#114:E	X(.?){4,8}Y	X1234567Y	(0,9)(7,8)
:HA#114:E	X(.?){4,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
#:HA#115:E	X(.?){5,8}Y	X1234567Y	(0,9)(7,8)
:HA#115:E	X(.?){5,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
#:HA#116:E	X(.?){6,8}Y	X1234567Y	(0,9)(7,8)
:HA#116:E	X(.?){6,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
#:HA#117:E	X(.?){7,8}Y	X1234567Y	(0,9)(7,8)
:HA#117:E	X(.?){7,8}Y	X1234567Y	(0,9)(8,8)	RE2/Go
:HA#118:E	X(.?){8,8}Y	X1234567Y	(0,9)(8,8)

# These test a fixed bug in my regex-tdfa that did not keep the expanded
# form properly grouped, so right association did the wrong thing with
# these ambiguous patterns (crafted just to test my code when I became
# suspicious of my implementation).  The first subexpression should use
# "ab" then "a" then "bcd".

# OS X / FreeBSD / NetBSD badly fail many of these, with impossible
# results like (0,6)(4,5)(6,6).

:HA#260:E	(a|ab|c|bcd){0,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#261:E	(a|ab|c|bcd){1,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#262:E	(a|ab|c|bcd){2,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#263:E	(a|ab|c|bcd){3,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#264:E	(a|ab|c|bcd){4,}(d*)	ababcd	NOMATCH
:HA#265:E	(a|ab|c|bcd){0,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#266:E	(a|ab|c|bcd){1,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#267:E	(a|ab|c|bcd){2,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#268:E	(a|ab|c|bcd){3,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#269:E	(a|ab|c|bcd){4,10}(d*)	ababcd	NOMATCH
:HA#270:E	(a|ab|c|bcd)*(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#271:E	(a|ab|c|bcd)+(d*)	ababcd	(0,6)(3,6)(6,6)

# The above worked on Linux/GLIBC but the following often fail.
# They also trip up OS X / FreeBSD / NetBSD:

#:HA#280:E	(ab|a|c|bcd){0,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#280:E	(ab|a|c|bcd){0,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
#:HA#281:E	(ab|a|c|bcd){1,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#281:E	(ab|a|c|bcd){1,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
#:HA#282:E	(ab|a|c|bcd){2,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#282:E	(ab|a|c|bcd){2,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
#:HA#283:E	(ab|a|c|bcd){3,}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#283:E	(ab|a|c|bcd){3,}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
:HA#284:E	(ab|a|c|bcd){4,}(d*)	ababcd	NOMATCH
#:HA#285:E	(ab|a|c|bcd){0,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#285:E	(ab|a|c|bcd){0,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
#:HA#286:E	(ab|a|c|bcd){1,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#286:E	(ab|a|c|bcd){1,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
#:HA#287:E	(ab|a|c|bcd){2,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#287:E	(ab|a|c|bcd){2,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
#:HA#288:E	(ab|a|c|bcd){3,10}(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#288:E	(ab|a|c|bcd){3,10}(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
:HA#289:E	(ab|a|c|bcd){4,10}(d*)	ababcd	NOMATCH
#:HA#290:E	(ab|a|c|bcd)*(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#290:E	(ab|a|c|bcd)*(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
#:HA#291:E	(ab|a|c|bcd)+(d*)	ababcd	(0,6)(3,6)(6,6)
:HA#291:E	(ab|a|c|bcd)+(d*)	ababcd	(0,6)(4,5)(5,6)	RE2/Go
